Phys.Rev. C 103, L051303 (2021)

J.Bishop, G.V.Rogachev, S.Ahn, E.Aboud, M.Barbui, A.Bosh, J.Hooker, C.Hunt, H.Jayatissa, E.Koshchiy, R.Malecek, S.T.Marley, M.Munch, E.C.Pollacco, C.D.Pruitt, B.T.Roeder, A.Saastamoinen, L.G.Sobotka, S.Upadhyayula

Evidence against the Efimov effect in ¹²C from spectroscopy and astrophysics

RADIOACTIVITY ¹²N(β⁺); ¹²B(β^-); measured β-delayed charged particles, Eα, Iα from the decay of 40-MeV ¹²N beam stopped inside the active-area of the TexAT (Texas Active target) TPC (Time Projection Chamber), Eγ, Iγ, γγ-coin from the decay of ¹²B using Gammasphere array at ANL. ¹²C; deduced no evidence for an hypothetical state predicted by Efimov effect at 7.458 MeV from a combined analysis of the two experiments involving charged-particle spectroscopy at Texas A and M, and γ-ray measurements at ANL, along with astrophysical rate calculations. Relevance to rate required for stars to undergo the red giant phase.

doi: 10.1103/PhysRevC.103.L051303